CVE-2026-8434

LOW EPSS 3.0%

Published May 21, 20261mo ago · Modified Jun 17, 20261w ago

2.3 CVSS 4.0

Low

Published May 21, 2026 1mo ago

Last Modified Jun 17, 2026 1w ago

Description

Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/backend/file rescanMultiple(). The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Yonatan Drori (Tenzai) for reporting.

CVSS Details

Base Score

2.3

Exploitability

—

Impact

—

Vector string

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector Network

Attack Complexity Low

Privileges Required None

User Interaction P

Scope X

Threat Intelligence

EPSS Exploit Probability

3.0% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 2

CWE-1275

CWE-352 Cross-Site Request Forgery (CSRF) Authentication

Affected Products 1

Vendor	Product	Version	Range
concretecms	concrete_cms	*	≥9.0.0 – <9.5.1

References 1

documentation.concretecms.org https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes

Release Notes

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.